Objective: To investigate the "supercompensation" effect of preschoolers during COVID-19 lockdown by comparing the changes in physical activity (PA), psychological and sleep indicators before and after lockdown.
Methods: 127 children (aged 3-6 years) were recruited. Before and after the lockdown, the children's PA levels were measured using the ActiGraph GT3X+, and their psychological and sleep indicators were measured using the Strengths and Difficulties Questionnaire (SDQ) and the Child Sleep Habit Questionnaire (CSHQ) respectively.
Results: In terms of PA, the children's total physical activity (TPA), low-intensity physical activity(LPA) and medium-intensity physical activity (MVPA) were all higher after lock down than before lockdown, with significant differences in MVPA (p<0.05). In terms of psychology, the children's SDQ scores and multidimensional scores were better after lockdown than before lockdown, with a significant difference in SDQ scores (p<0.05). In terms of sleep, children's CSHQ scores were better after lockdown than before lockdown, with a highly significant difference in CSHQ scores (p<0.01).
Conclusion: After lockdown, children's PA, psychological and sleep effects were all "supercompensation". In particular, the PA of preschoolers before, during and after lockdown may show a "baseline-inhibition-supercompensation" process.